Trade barrier can hurt a country's economy by reducing its overall economic efficiency. Thus, option C is correct.
Trade barrier consists of various policies and reforms on international trading that is applied by the government to protect the country.
Implementation of trade barrier results in reduction of overall economic efficiency and growth as the business may face various problems while importing or exporting good and services.
Trade barriers create problem when it comes to international trading with various restrictions which results in reduction in overall efficiency. Therefore, C is the correct option.
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